MC: Factor out an MCObjectStreamer class, which will be shared by the concrete

object file format writers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106140 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/CMakeLists.txt

@@ -14,6 +14,7 @@ add_llvm_library(LLVMMC
   MCLoggingStreamer.cpp
   MCMachOStreamer.cpp
   MCNullStreamer.cpp
+  MCObjectStreamer.cpp
   MCObjectWriter.cpp
   MCSection.cpp
   MCSectionCOFF.cpp